In a building with 10.000 cubic feet where the air changes every two hours, what the rate of air change? A. 167.7 cfm B. 83.3 cfm C. 133.3 cfm D. 50 cfm

B. 83.3 cfm

Explanation:

given that the rate of change is,

= 10000 ft³ per 2 hour  (note 2 hours = 60 min x 2 = 120 min)

=  10000 ft³ per 120 min

= 10000 / 120  ft³ per min

= 83.3 ft³ per min

hello there!

your answer is a “generator”

a generator does not create energy but instead it transforms it.

it’s basically a motor working in reverse.